Other ingredient

Ornithine

Ornithine (L-ornithine) is a non-proteinogenic amino acid and key intermediate in the urea cycle. In skin biology, it serves as a precursor to proline and hydroxyproline (essential amino acids in collagen) and contributes to the natural moisturizing factor of the stratum corneum. In cosmetics it is used as a skin-conditioning humectant, typically at low concentrations in premium formulas alongside other amino acids and actives.

Also known as: L-ornithine

skin-conditioninghumectant

Benefits

  • Amino acid that acts as a skin-conditioning agent, contributing to surface smoothness and moisture balance in formulations
  • Participates in the natural moisturizing factor (NMF) pool of the stratum corneum, contributing to natural hydration maintenance
  • Metabolic precursor to proline and hydroxyproline (collagen amino acids) — in vitro evidence suggests ornithine supplementation may support collagen turnover in skin cells

No known watch-fors.

Compatibility

✓ Works well with
+ Arginine+ Glycerin+ Sodium Hyaluronate
At a glance
CategoryOther
IrritancyLow
Beginner-friendlyYes
Pregnancy safeYes
In your routine

Pairs well with Arginine and Glycerin and others.

Found in 1 product
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Products with Ornithine

Age Focus Prime Double Effect AmpouleAmpoule
Isa Knox
Age Focus Prime Double Effect Ampoule